What is the syntax of is_features

QLM can embed up to 32 features in a license key. The 32 features are broken into 4 feature sets (0 to 3) with 8 features per feature set. The 8 features in a feature set are defined as follows: 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128

When invoking GetActivationKey or GetActivationKeyWithExpiryDate, you can specify which features to enable on the command line.